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Rode a Giant Carbon - First thoughts and questions...(8 posts)

Rode a Giant Carbon - First thoughts and questions...maurizio
Dec 17, 2002 1:22 PM
I went down to my LBS and rode one of the ONCE Giant Carbon bikes. And the first thing I noticed was how incredibly light the thing was - GOOD LORD, I thought maybe the wheels were not attached...
Anyhow, one of the first things I do when checking out a new bike is to step on the crank arm to see how much flex the frame has - this one had quite a bit (is that normal for carbon frames?)
I ride a 57/58 normal frame and the shop put me on a medium which has a top tube about 2 cm shorter than my regular bike. The Giant's stem was slammed all the way down so that made up for some of the reach - a 135 stem made up for the rest.
On to the ride.
The Giant is silky smooth. There wasn't a hint of harshness anywhere to be found. I wonder if it was frame flex or the carbon soaking up the bumps.
It tracked nicely but the true test would be to put my regular pedals on it and jam up a climb. Somehow, I got the feeling that the LBS wasn't up for a 1/2 day test ride...
I'm interested in the frame/fork combo, but have reservations about the fit (the large seems too big...), the frame flex and overall durability.
Anyone have comments that could help?
For reference, I am currently riding a bulletproof Bianch Mega Titanium that is stiff as anything out there.
try a 5200 toolaffeaux
Dec 17, 2002 1:31 PM
Trek makes a great carbon frame too. Test ride it as well. Carbon can be made to be stiff or flexy in any direction that the maker desires during the manufacturing, so it's impossible to say that "carbon fiber" rides like ____ (fill in the blank).

The Trek's have a traditional geometry and should definitely be compared to the Giant. I think that the Trek OCLV ride great. (I do not own one, as I'm happy with my heavy steel bike.)
Size L is Lmass_biker
Dec 17, 2002 1:51 PM
Rode a size L alum. TCR for a year and found it too long in the cockpit. On a "standard" sized bike I ride a 56.6 - 57ish TT. The size M would be the best bet. Don't know how the carbon TCRs ride but the geometry on my old alum. TCR was great - agile, responsive, and quite predictable.

Demo'd one, too.fracisco
Dec 17, 2002 2:31 PM
I demo'd a TCR Comp size Large over the weekend. I only took it around the block, and I would love to take it up a climb and descend the other side to see how it feels.

I also ride a 57/58 right now, and I want to see how a size Medium feels. I have a friend with the TCR Comp in a size Medium, so I'll get to try it out sometime in the next few weeks. He used to have a size Large in the Aluminum frame, and he felt it was a bit too big for his style.

It's a nice ride, but I don't think that I will really be able to compare it to my Cannondale without an extended ride.
TCR composite frame weight: 960g (med) on cert digital scalewettap
Dec 17, 2002 3:22 PM
Marcel Wust (Team Coast) tested tcr comp 2003 and found no frame flex whatsoever, fork however was slightly flexy, according to him. Must test frame flex on mount with wheels removed. measure movement in lateral plane, in mm with digital meter. If you test by just stomping on pedals you'll never get objective results.
I own 2003 composite frame in med. Lateral stiffness is great, much greater than 2002 alum tcr. Weight is lighter as well. Ride is smooth and comfortable. Very little if any wasted energy.
TCR composite frame weight: 960g (med) on cert digital scaleThe Human G-Nome
Dec 17, 2002 3:43 PM
wow, that's lighter then some U2 frames.
TCR composite frame weight: 960g (med) on cert digital scalelegs
Dec 17, 2002 10:04 PM
Note: Wust's test was on a custom made frame.. not a stock Giant.
i ride a large...Frith
Dec 18, 2002 7:43 AM
I'm 6'.75" with an 87cm inseam. I think i'm probably just on the bottom edge of who should ride a large. It fits me nicely though and the medium is too small. I'm a bit long legged and i generally fit better on the italian geomety (shorter top tube). The virtual top tube on the giant is something like 58.5cm which on a regular bike is definitely to large for me... To that end I decided to ignore my previous notions about frame sizing when trying to fit into a compact. I wouldn't even think about trying to fit onto something with a 58.5 tt on a traditional frame. I would ideally ride a 57.5 c-c tt
One other thing i should add. If your femurs aren't really long then chances are you need to swap out the aero seatpost for one with way less setback. I couldn't achieve KOPS even with the seat slammed all the way forward... this would definitely change your reach.
For reference... Here's the stats again...
87cm inseam
tcr comp 1 size large
stem 100 flipped upward